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🚽 Upgrade your throne with Fluidmaster’s PerforMAX — flush like a pro, save like a boss!
The Fluidmaster K-400H-040-T5 PerforMAX Fill Valve and 3-Inch Flapper Toilet Repair Kit is a universal, easy-to-install solution designed to restore your 3-inch flush valve toilet to peak performance. Featuring adjustable water flow, durable plated plastic construction, and a smooth-operating flapper, this kit offers a cost-effective alternative to costly plumber visits. Backed by a 7-year warranty and top customer ratings, it’s the smart choice for efficient, reliable toilet repair.




| ASIN | B09NYKZ1FH |
| Best Sellers Rank | #8,895 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Toilet Repair Kits |
| Brand Name | Fluidmaster |
| Connector Type | Threaded |
| Customer Reviews | 4.6 4.6 out of 5 stars (679) |
| Exterior Finish | Plated/Coated Plastic |
| Global Trade Identification Number | 00039961031822 |
| Included Components | PerforMAX Toilet Fill Valve, 3-Inch Flapper |
| Inlet Connection Size | 2 Inches |
| Inlet Connection Type | Threaded |
| Item Dimensions | 3.74 x 6.89 x 14.37 inches |
| Item Type Name | Toilet Repair Kit |
| Item Weight | 14.9 Ounces |
| Manufacturer | Fluidmaster |
| Manufacturer Warranty Description | 7 Year Limited |
| Material Type | Plastic |
| Model Number | K-400H-040-T5 |
| Number of Pieces | 2 |
| Outlet Connection Size | 2 Inches |
| Outlet Connection Type | threaded connection |
| Size | Universal, for 3 In. |
| Specification Met | ASME B16.34, UPC, WaterSense |
| Thread Size | 27 TPI |
| Thread Type | NPT |
| UPC | 039961031822 |
| Unit Count | 1.0 Count |
| Valve Type | Float Valve |
C**Y
Does the job, easy replacement for faulty fill valve
OEM fill valve on my Gerber toilet would fail to run and fill the holding tank intermittently after a flush, so it was time to replace it. The Fluidmaster has very straightforward installation instructions, it's about a 10 minute job at most. Save yourself the $350-$400 plumber bill and replace the fill valve yourself...most 3rd graders could probably handle the installation of a new fill valve and flapper. The adjustable water flow is a nice bonus but most will probably find the max setting is the best option. The flapper is nice as well....seems to operate more smoothly than the 3rd-party Korky flappers I've used in the past. Just make sure you have a bucket handy and drain the holding tank as much as possible before removing your old fill valve, or you'll be mopping up a lot of water. Overall, easy replacement, reasonably priced, no complaints.
R**.
Well proven and did not disappoint
I've used Fluidmaster for many years because their product is quality and easy to install. What else is needed?
T**S
Easy to install and will save you from calling a plumber.
This is really easy to install. No plumber needed for this job. It fits perfectly and never leaks.its really worth its weight in gold.
A**R
Flapper hole must be 2 1/2 <.
If the drain hole in your tank isn't 2 1/2" or bigger, don't plan on using the flapper, The flush unit went in straightwardly, works fine after adjustment.
M**E
Perfect replacement
We have three Kohler toilets in our house and in one of them, the waster was constantly leaking on-and-off. No amount of adjustment would fix it. This was an exact replacement for the old valve, but has several improvements. It how has two easy-to-turn adjustment knobs, rather than plastic screws, to adjust the fill volume and fill level. It took less than 15 minutes to replace this.
S**S
Toilet fill valve
Installed by instructions, performed.
L**J
good fit
worked perfect, fast delivery. completive price. Would buy again.
C**.
Good price! Easy to install!
Easy to install with a good price.
M**.
Came with a very clear, multilingual instruction booklet. Followed the steps, everything works great and the installation was a breeze.
A**R
Replaced an American Standard old ballcock flush valve, super easy to install and works well. The flapper was too big though. Pro tip, use CLR or equivalent to clean tank - let it sit for 24 hours.
C**E
Easy install ... good instructions. Solved my problem with slow leaking of water.
T**R
Easy replacement and much easier and cheaper then replacing the toilet
B**O
Works fine, decent instructions. But the one it replaced was nearly silent, and this one fairly noisy when refilling.
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